Page 8 - The Geology and Ore Deposits of Sierra County, New Mexico - Bulletin 10
P. 8
6 CONTENTS PART II, MINING DISTRICTS—Continued
Animas Hills—Continued
Hillsboro (Las Animas) mining district—Continued
Geology—Continued Igneous rocks—Continued
Basalt ----------------------------------------------------------------131 Structural relations ------------------------------------------------------131 Geologicalsequence -----------------------------------------------------132 Ore deposits ------------------------------------------------------- 133
Secondary enrichment ------------------------------------------------138 History and production -------------------------------------------- 139 Mine descriptions -------------------------------------------------_ ____141
General features of workings ---------------------------------141 Garfield-Butler group ---------------------------------------- 142 Bigelow group ------------------------------------------------------- 144 Mary Richmond mine -----------------------------------------145 Bonanza mine ----------------------------------------------------------148 Rattlesnake mine -------------------------------------------------- 151 Katherine vein -------------------------------------------------154 85 mine ------------------------------------------------------------------155 Opportunity mine -----------------------------------------------------155 McKinley, Sherman and Ready Pay veins --------------------- 156 Wicks vein ---------------------------------------------------------------157 Chance mine ------------------------------------------------------------158 Petaluma group ----------------------------------------------------- 159 North Percha Mining Co. property ----------------------------- 159 Sweetwater claim --------------------------------------------------- 159 Fullerton and Little Jewess properties-------------------------- 159 Republic and Wisconsin claims --------------------------------------160 Property of El Oro Mines Co. ------------------------------------ 160 Copper Flat claims ---------------------------------------------- 163 Freidberg mine --------------------------------------------------165' Other lode mines ------------------------------------------------ 166 Animas (Hillsboro) placers -------------------------------------166
Possibilities of the district --------------------------------------- 169 Lake Valley Hills ------------------------------------------------------170 Lake Valley district --------------------------------------------------- 170 Location and area ----------------------------------------------------- 170 Geography -----------------------------------------------------------------171 Geology --------------------------------------------------------------------172 The rocks -------------------------------------------------------- 172 El Paso limestone ------------------------------------------------ 172 Montoya limestone ---------------------------------------------- 172 Fusselman limestone ---------------------------------------------172 Percha shale ------------------------------------------------173 Lake Valley limestone ----------------------------------------- 173 Intrusive igneous rocks --------------------------------------------174 Tertiary lavas __ --------------------------------------------174 Structural relations --------------------------------------------------- 175 Ore deposits ---------------------------------------------------------------176 History and production --------------------------------------------- 178
Character -------------------------------------------------------- 133 Fissure veins in andesite flows -------------------------------- 133 Disseminated deposits in monzonite porphyry ------------ 136 Replacement deposits in limestone -------------------------- 136 Placer gold deposits ------------------------------------------- 137
Mine descriptions
Grande workings
Bella workings
Apache workings ------------------------------------------ 183
179 -----------------------------------------------_.180 ----------------------------------------------- 182
Future possibilities 183
